The main criteria to look for in a Shrink Film is the desired shrink level across the machine direction (MD) and transverse direction (TD). The shrinkage levels are determined by the blow - up ratio and the take up speed of the film at the extruders. As different product shapes lead to different film sizes, the die size must be of the right configuration to achieve the desired shrinkage level. Given that Great Wall Plastic Industries (GWPI) has the largest selection of extruders and die sizes, we are therefore ensured of being able to meet all your Shrink Film specifications.